Foetal sex can be determined by examining cel | vedclass

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Question

(A) The sex of a foetus can be determined by amniocentesis,a procedure where amniotic fluid is sampled. In female cells,one of the two $X$ chromosomes

Vedclass · Accepted Answer

Barr bodies

Vedclass · Answer

(A) The sex of a foetus can be determined by amniocentesis,a procedure where amniotic fluid is sampled. In female cells,one of the two $X$ chromosomes is inactivated and condensed into a structure known as a $Barr$ body,which can be observed in the interphase nucleus. Since males have only one $X$ chromosome,they do not possess $Barr$ bodies. Therefore,the presence or absence of $Barr$ bodies in the cells obtained from the amniotic fluid is used to determine the sex of the foetus.

Foetal sex can be determined by examining cells from amniotic fluid by looking for:

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